【作者】 陈剑锋；

【导师】 刘伟；

【作者基本信息】 东北石油大学 ， 控制工程， 2011， 硕士

【摘要】 油田注水的方法是提高油田采收率的一个十分成熟有效地方法,但是因为国内注水泵与国外还存在差距,所以导致成注水效率低、单耗高。为了改变这种情况提高注水效率降低能耗,研究一套适合我国国情、自动化程度和高效率的注水泵站系统势在必行。针对这种情况,我们采用了泵控泵技术。在注水泵前面增加前置泵,将PLC与变频器相结合,利用变频器对前置泵转速进行调节,在流量变化的情况下调节注水泵出口压力,形成恒压供水,实现了前置泵变频调速系统控制。采用PLC内置PID运算功能,结合恒压供水系统特点,实现PLC对系统的控制。本文给出了系统的主要组成部分和详细的PLC控制程序。该系统由注水泵电机组、前置泵电机组、PLC、变频器、压力传感器、温度传感器以及组态软件等组成。采用西门子S7-300硬件设计系统,利用SETP7编程,在紫金桥组态软件平台下开发监控系统软件,实现对参数的实时监控和超限报警,绘制参数的实时曲线以及打印报表。更多还原

【Abstract】 In order to increase the recovery ratio of oil field, the water injection is a mature and useful method. Whereas there still is a great gap of our water injection pump between which of abroad, this situation result in a low efficiency of water injection and high power consume. In order to change this condition, it’s necessary to develop an automatic and high-performance water injection system which suit to our national conditions. Consequently we explore the pump control pump system. Namely add a pre-pump in front of the water injection pump, combine the PLC with the frequency converter, and adjust the rotation rate of pre-pump by using transducer. Then we can adjust the outlet pressure of water injection pump during the flow rate change, formation the constant pressure water supply, and then achieve the pre-pump frequency control system design. We use PLC built-in PID operation function, combine the constant pressure water supply character and achieve the control of PLC to the system. In this paper we give the main composition of this system and detail PLC control program. This system composed of water injection electric machine suite, pre-pump electric machine suite, PLC, frequency converter, pressure sensor, temperature sensor and configuration software. We use the SETP7 program of Siemens S7-300 hardware design system to explore the monitoring system software based on the Realinfo configuration software platform. Using this method we achieve the real-time monitoring of parameters and overrun alarm, as well as rendering real-time curve parameters and print statements.更多还原